Mini-Quiz: Uses for Hydrogen

1. If the atomic weight of hydrogen is 1 and helium is 4, how can helium gas be only twice as heavy as hydrogen gas?

   Half of the helium leaks out of the balloon or blimpSorry, not correct. Try another button. Hydrogen is actually twice as heavy as heliumGood try, but not right. Select another answer. Helium gas consists of single atoms, while hydrogen consists of H2That is correct. You know about hydrogen.

2. How can hydrogen cars be free of pollution?

   The exhaust would only be water vaporCorrect. You are smart! Hydrogen would combine with carbon to produce healthy methane gasOops! Wrong answer. Re-read the question and try again. They would be lighter than airSorry, not correct. Try another button.

3. Why is hydrogen needed to make ammonia?

   So that ammonia can be lighter than airGood try, but not right. Select another answer. Each ammonia molecule has 3 hydrogen atomsThat is correct. You know about hydrogen. Hydrogen makes ammonia smell real badOops! Wrong answer. Re-read the question and try again.

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